Bichard mcmanus



(No Model.)

R. MGMANUS.

' Oar.

No. 230,314. Patented July 20,1880.

UNITED STATES PATENT OFFICE..

RICHARD MCMANUS, OF BOSTON, MASSACHUSETTS.

OAR.

SPECIFICATION forming part of Letters Patent No. 230,314, dated July 20, 188C.

Application filed May 3l` 1880. (No model.)

To all whom lt may concern Be itknowu that I RICHARD MCMANUS, of Boston, in the State ot' Massachusetts. have invented an Improved Oar, of which the following` is a specification.

I have represented in the drawing a blade of an oar containing),` my invention.

It is well known to oarsmen that when the oar in rowing' rst strikes the water there is a considerable jar or shook, o overoine which the oarsinan mustexert more strength than would otherwise he necessary. To overcome this I place in the blade of lthe oar a number of holes or instead of the holes slots or square openings, or both, may be used. I make the blade ot' the oar longer and wider, so as to present the. same amount ot' surface for the propulsion of' the boat. as the blade of the oar has when made in the ordinary way.

It will be found that my oar, in addition to zo RICH ARI.) MCMANUS.

Witnesses GEORGE H. HosMER. OHAS. H. DREW. 

